DKY TOOLS Top-quality Mortiser Drill Bit Square Hole 16mm 1pcs 5/8\" Chisel Tool Set used in an electric drill, square drill holes need to fit a square hole drill

* brand new and high quality *Made of high quality material, durable and practical to use *Arc design, exquisite sharpen durable. *Square hole drill can not be used in an electric drill, square drill holes need to fit a square hole drill (slot and tenon machine) drilling to use. *Reduce labor intensity of construction workers, accelerate construction speed, reduce construction costs for construction, installation, renovation, decoration industries Specification: *Size (Approx.): 16mm / 5/8" *Material: Steel *Hardness: HRC 48~50 *Color: As Pictures Show *Use matters: Square hole drill is mainly used for woodworking aspects. Package Contents: 1*Square Hole Drill Bit